I'll re-iterate what has sort of been said already and what I think I said in a different forum.
That is if you don't know where you are tell us (ATC that is) especially if its a radar unit. At East Mids we just a bout always have a spare controller sat next to us so even if the frquencuy sounds manic, if you say your lost we'll put you to a different frquency and find you and either watch you to destination or hand you over to someone who can. Or like has been said call D&D.
The key here is that getting lost is not illegal, even if you declare a pan-infinging CAS quite definitely is!! We are here to help.
On a separate matter, I don't think a moving map GPS is essential at all. I use an aviation one that has aifields and VOR's and nothing else. I set the route I have planned on the map set it running and use it as a confindence check-it stops you convincing yourself you are not where you should be (which reading many of the honest stories above sound like a frequent cause of problems) and it is also useful if during a zone transit for example you get deviated by ATC as well as the usual diversion, estimate update type functions at which GPS' excel.